reindeksing files don't work

[smporten]

Hi Forum.
I have a strange problem with my smf gallery pro 7 & 8.
i try to reindex my files, i got this error
Call to undefined function iconv_strlen()
how can i solve that.
If i check the log, i get this errors. index.php?pretty;action=gallery&sa=regen2;start=3875
8192: Methods with the same name as their class will not be constructors in a future version of PHP; GIF_eXG has a deprecated constructor
Fil:  /Sources/class.gifresize.php
Line: 79
 

[SMFHacks]

Make sure " iconv module installed and also is your php compiled with the iconv module enabled"